Error with apturl (getdeb/playdeb) in Ubuntu

I'm trying to get playdeb/getdeb to work in order to install Wolfenstein: Enemy Territory. As it fails from the browser, I decided to go to the terminal and see the output. This was the result.

raman@GreenEyes:~$ apturl apt:enemy-territoy /usr/lib/python3/dist-packages/AptUrl/gtk/GtkUI.py:1: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded. from gi.repository import Gtk

(apturl-gtk:11037): Gtk-WARNING **: Theme parsing error: gtk.css:90:44: Failed to import: Error opening file: >No such file or directory ERROR:root:importing aptdaemon Traceback (most recent call last): File "/usr/lib/python3/dist-packages/AptUrl/gtk/backend/init.py", line 40, in get_backend from .InstallBackendAptdaemon import InstallBackendAptdaemon File "/usr/lib/python3/dist-packages/AptUrl/gtk/backend/InstallBackendAptdaemon.py", line 10, in <module> from UpdateManager.backend import InstallBackend File "/usr/lib/python3/dist-packages/UpdateManager/backend/init.py", line 14, in <module> from UpdateManager.Dialogs import Dialog ImportError: No module named 'UpdateManager.Dialogs' Traceback (most recent call last): File "/usr/bin/apturl-gtk", line 43, in <module> ui = GtkUI() File "/usr/lib/python3/dist-packages/AptUrl/gtk/GtkUI.py", line 38, in init self.backend = get_backend(self.dia) File "/usr/lib/python3/dist-packages/AptUrl/gtk/backend/init.py", line 48, in get_backend from .InstallBackendSynaptic import InstallBackendSynaptic File "/usr/lib/python3/dist-packages/AptUrl/gtk/backend/InstallBackendSynaptic.py", line 12, in <module> from UpdateManager.backend import InstallBackend File "/usr/lib/python3/dist-packages/UpdateManager/backend/init.py", line 14, in <module> from UpdateManager.Dialogs import Dialog ImportError: No module named 'UpdateManager.Dialogs'